Table 3. AVM Profile.

Grade of radiosurgical effect (SRS grade)		Total	A	B	C	B + C
category of group		S group			N group
total number		73	44	18	11	29	S vs N group	SRS grade A vs C
AVM profile
location							NS	NS
	Frontal	20	15	4	1	5
	Temporal	8	4	2	2	4
	Parietal	10	4	3	3	6
	Occipital	11	6	2	3	5
	Cerebellum	16	11	5	0	5
	Thalamostriate	3	2	1	0	1
	Brainstem	4	1	2	1	3
Spetzler-Martin grade							NS	NS
	Grade 1	9	8	1	0	1
	Grade 2	17	12	3	2	5
	Grade 3	32	18	10	4	14
	Grade 4	14	6	3	5	8
	Grade 5	1	0	1	0	1
size	maximum diameter (mm)	31.6 (11-72)	28.7 (12-55)	32.9 (11-45)	40.7 (20-72)	35.9 (11-72)	NS	0.013
	initial volume (ml)	13.8 (1-46)	12.0 (1-45)	12.4 (1-35)	23.5 (2-46)	16.6 (1-46)	NS	0.004
	≤5 ml	24	18	6	0	6
	6-10 ml	15	11	3	1	4
	11-20 ml	13	6	3	4	7
	21-30 ml	10	4	4	2	6
	31-40 ml	9	4	2	3	5
	>40 ml	2	1	0	1	1
mBRAS	mean value	2.13	2.01	1.94	2.97	2.33	NS	<0.001
	≤1.00	15	11	3	0	4
	1.01-1.50	11	6	4	1	5
	1.51-2.00	16	11	4	1	5
	≥2.01	31	16	7	9	15
Angioarchitecture
Nidus type	compact	52	37	12	3	15	0.004	<0.001
	diffuse	21	7	6	8	14
Daughter nidus	5	2	1	2	3	NS	NS
Draining pattern	single (superficial)	18	14	3	1	4	0.031	0.0013
	single (deep)	11	8	3	0	3
	multiple (superficial main)	32	17	8	7	15
	multiple (deep main)	12	5	4	3	7
Associated varix		6	5	1	0	1	NS	NS
Associated aneurysm no aneurysms		52	33	13	6	19	NS	NS
	proximal (treated)	13(5)	6(2)	3(0)	4(3)	7(3)
	flow-related (treated)	3(3)	2(2)	1(1)	0	1(1)
	intranidal (treated)	6(4)	3(3)	2(1)	1(0)	3(1)
Meningeal feeders	no	56	38	16	4	18	0.023	0.002
	yes (treated)	17(9)	6(4)	4(1)	7(4)	11(5)

mBRAS: modified radiosurgery-based arteriovenous malformation (AVM) score